Merge 80146 from mainline.

If we're emitting additional CIEs due to personality functions
don't emit the default one. Explicitly check for the NULL
CIE later.

llvm-svn: 81702

Author: tlattner

llvm/lib/CodeGen/AsmPrinter/DwarfException.cpp

@@ -202,7 +202,7 @@ void DwarfException::EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
 
     // If there is a personality and landing pads then point to the language
     // specific data area in the exception table.
-    if (EHFrameInfo.PersonalityIndex) {
+    if (MMI->getPersonalities()[0] != NULL) {
       bool is4Byte = TD->getPointerSize() == sizeof(int32_t);
 
       Asm->EmitULEB128Bytes(is4Byte ? 4 : 8);

llvm/lib/CodeGen/MachineModuleInfo.cpp

@@ -45,7 +45,7 @@ MachineModuleInfo::MachineModuleInfo()
 , CallsUnwindInit(0)
 , DbgInfoAvailable(false)
 {
-  // Always emit "no personality" info
+  // Always emit some info, by default "no personality" info.
   Personalities.push_back(NULL);
 }
 MachineModuleInfo::~MachineModuleInfo() {
@@ -149,7 +149,12 @@ void MachineModuleInfo::addPersonality(MachineBasicBlock *LandingPad,
     if (Personalities[i] == Personality)
       return;
 
-  Personalities.push_back(Personality);
+  // If this is the first personality we're adding go
+  // ahead and add it at the beginning.
+  if (Personalities[0] == NULL)
+    Personalities[0] = Personality;
+  else
+    Personalities.push_back(Personality);
 }
 
 /// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.